Expansion Project

ADVANCED WATER PURIFICATION FACILITIES (AWPF) EXPANSION PROJECT

The AWPF at TIWRP is undergoing a major expansion project. The AWPF Ultimate Expansion will double the plant’s production from six million gallons per day to 12 million gallons per day by the end of 2016. By enlarging and improving processes like Microfiltration and Reverse Osmosis, the plant can better serve the Los Angeles area and lessen the reliance on imported potable water.

The AWPF Ultimate Expansion project includes the construction of a feedwater equalization tank, additional microfiltration (MF) and reverse osmosis (RO) systems, and an advanced oxidation process (AOP). After the scheduled completion of the AWPF Expansion Project in December 2016, 100% of plant flow will receive advanced treatment to produce 12 MGD, or 13,440 Acre-foot per Year (AFY).

Doubling the plant’s current out-put will allow the plant to do the following:

Continue recharging the Dominguez Gap Barrier (DGB)

Supply the Machado Lake to replenish its evaporation losses

Provide various Harbor-area industrial users with recycled water

This recycled water decreases the demand for potable water that is imported by the Los Angeles Department of Water and Power (LADWP). The AWPF expansion project is in partnership with LA Sanitation (LASAN), LADWP, LA County Sanitation District, and the Water Replenishment District.

EXPANSION AT A GLANCE

Here are some quick facts about the AWPF Ultimate Expansion Project:

The Ultimate Expansion Project is a $50M Design/Build Project. The design/build contract was awarded to design/construction team of Walsh Construction and Carollo Engineers.

The Ultimate Expansion Project will increase capacity of the AWPF from the current six million gallons per day (MGD) to 12 MGD.

New construction/expansion will double the capacity of the Microfiltration and Reverse Osmosis processes, and will replace the current disinfection process with a new highly effective Advanced Oxidation Process (AOP).

The AOP procoss uses ultraviolent light in combination with sodium hypochlorite (industrial strength bleach) to remove pathogens and bacteria from the water.

After the completion of the AWPF Expansion Project in December 2016, 100% of plant flow will be processed to produce 12 MGD, or 13,440 Acre-foot per Year (AFY), roughly equivalent to the daily use of potable water by 67,000 citizens.

Doubling the plants current output of highly treated recycled water will allow LASAN to provide the DGB with its total needs, supply the Machado Lake to replenish what it lost to evaporation, and provide various Harbor-area industrial users with recycled water.

This highly treated recycled water will be used to off-set imported water in the Harbor area, allowing LASAN to beneficially reuse this precious resource, which otherwise would have been discharged to the Los Angeles Harbor waters as tertiary effluent.